Air-valve for pneumatic tires.



L. GREENWALD.

AIR VALVE FOR PNEUMATIC TIRES. APPLICATION FILED JAN-6.1916.

Patented Feb. 5, l9l&

WITNESSES: INVENTOR.

' 1 GPEE/v W4 ATTORNEY LEMON GREENWALD, 0F AKRON, OHIO. ASSIGNOR TO THE FIRESTONE TIRE &. RUBBER COMPANY, OF AKRON. OHIO, A CORPORATION OF OHIO.

AIR-VALVE FOR PNEUMATIC TIRES.

Specification of Letters Patent.

Patented Feb. 5, 121.

Application filed January 6. 1916. Serial No. 70,561.

To all whom it may concern:

Be it known that I, LEMON GREENWALD, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented certain new and useful Improvements in Air-Valves for Pneumatic Tires, of which the following is a specification. i

This invention relates to air valves particularly to those intended to be used in pneumatic tires and has for its object the construction of an improved type of valve insides. This term is used to cover that part of the valve structure which is removable from the valve casing and usually comprises the valve prop'er, packing ring, valve spring and attached parts.

It is one of the principal objects of this invention to construct the valve insides as compactly as possible, housing the spring within the valve so that it is not subject to injuries due to careless handling, as is quite frequent in valves. of the type in use at the present time. It is also one of the objects of the invention to improve the means by which the removable member carryingthe valve parts may be screwed into and out of its seat in the enlarged part of the valve casing.

These and other objects will appear from the following specification and the accompanying drawings, in whichlike reference numerals refer to like parts, and in which:

Figure 1, is a cross section of the upper part of an ordinary valve caslng showing the valve properly seated in position.

i Fig. 2,,is an elevationof the valve stem or post.

Fig. 3, is a plan view of the upper end of the valve.

The improved valve structure is adapted to be placed in the well known valve casing in use at the present time, although. it is not limited to use with this particular form of casing. The upper end of the casing is shown in l ig. 1, at 5, the exterior surface being threaded for the reception of the dust cap and the valve cap as common 1n the art. The casing is bored as at 6 for the passage of the air and the upper end is counterbored as at 7, the inside surface ofthe counter-bore being screw threaded and the surface 8 joining the bore being tapered.

llnto the part 7 is screwed a barrel or shell 9, which carries the valve parts. This barrel is hollow and open in the lower end, the upper end being partly closed by a flange. As shown in Fig. 3, the flange is cut away to form two recesses 10, which are placed diametrically opposite each other and shown in the form of semi-circles, al-

though this form is not essential. Between the recesses, the top of the barrel is cut out to form shoulders 11, which are joined by arcs 12.

In the opposite end of the barrel is driven a plug 13 until a circular shoulder 14 is forced against the lower end of the shell 9. Below the-shoulder the plug is grooved and in this groove is placed a circular packing 0r washer 15, which is adapted to be cated in the bore 6. The plug 13 and the,

valve piece 17 constitute the valve members. The valve piece is provided on its upper surface with a ring of packing material 18 adapted to be forced against the lower end of the plug. The valve 17 is carried by a post or valve stem 19, passed through the valve piece and located within the plug and barrel. The upper end of the post extends beyond the top of the barrel being guided by the flange at the top of the barrel and projects a slight distance above the upper edge of the valve casing. The valve piece is driven over the lower end of the post and is held against an integrally formed shoulder 20 by pinching the stem as in 21.

Near its upper end, the stem is formed with an integral circular enlargement 22, and the 11 per surface of the plug 13 is formed wit an integral extension 23, spring 24 being located between the plug and the enlargement and positioned by the parts 22 and 23. Above the shoulder 22, the valve stem is formed with spring abutment or enlargement 25, against which the upper end of the spring 24 is adapted to rest. From this construction, it will be seen, that the circular cut outslO and insure free passage of air to and from the interior of the barrel.

When assembled as shown in Fig. 1, enlargement is located near the under side of the flange on the top of the barrel. Above D the enlargement the post is extended to form a flattened end 27, which passes through the upper end of the barrel and extends above the upper edge of the casing, forming a projection by which the valve may be opened. This projected end has an additional function, for asshown in Fig. 3, it is received between the shoulders 11 of the recess in the top of the barrel and by this means the post and the barrel are locked against relative rotation. By the novel construction shown, the valve stem may be used to screwthe valve insides or shell into and out of its position in the end of the valve casing. The ordinary valve cap in use at the present time will operate with this mechanism, although it is not essential as other appliances may be used, or in fact the barrel may be screwed into a tight fit without the use of any of these devices, enough purchase being provided by the end of the valve stem to allow operation by the fingers alone. I

The construction of'the end of the valve stem and the barrel is considered one of the principal features of this invention, as it does away with the necesslty for the provision of any screw driver slot or projections in the top of the barrel. It also does away with the necessity of furnishing a socket for the reception of the extending valve stem in any tool-that may be used to screw the removable part of the valve to its seat.

Objects and advantages other than those described will be apparent from this disclosure, and are intended to fall within the scope of the appended claims.

Claims:

1. A removable valve part comprising an exteriorly screw threaded barrel, valve members and a valve stem carried by said barrel, a recess in said barrel, a non-rotatable part on the valve stem adapted to be received in the recess, and a formation on said stem by which it may be rotated together with the barrel.

2. A removable valve part comprising an exteriorly screw threaded barrel, valve members and a valve stem carried by said barrel, a flat part on the outer end of said valve stem extending above the barrel and shoulders on said barrel adjacent the flat part.

3. A removable valve part comprising an exteriorly screw threaded barrel, valve members and valve stem carried by said barrel, a flatpart on said valve stem extendin above said barrel and a shoulder on said barrel adjacent the flat part and cooperating therewith to make a non-rotatable connection between the barrel and the valve stem.

4. A removable valve part comprising an exteriorly screw threaded barrel, an apertured plug closing the lower end of said barrel, a flange on the upper end of said barrel, a valve stem guiding formation on the flange, a valve carrying stem extendin above said barrel movable longitudinally but rotatively immovable in respect thereto and a valve on the stem adapted to close the aperture in said plug.

5. 'A' removable valve part comprising an exteriorly screw threaded barrel, an apertured plug closing the lower end of said barrel, a flange on the upper end of said barrel having a recess for the passage of air into and out of said barrel, a valve stem guiding formation on the flange, a valve carrying stem extending through said flange and -movable longitudinally, of said barrel but rotatively immovable in respect thereto and a valve on the stem adapted to close the aperture in said plug.

LEMON GREENWALD.

Witnesses:

A. Bons'rnor, A. L. ELY. 

